Wind Slabs
N
NE
E
SE
S
SW
W
NW
- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 1–2.5
Ongoing ridge top winds are likely creating wind slabs in the alpine and open tree line
Avalanche forecast
View on mapJasper
Nov 16 – 17, 2021
Archived · expired 5 years ago
Avalanche danger
Wed
Thu
Alpine
4 · High
Treeline
3 · Considerable
Below
2 · Moderate
Highlights
It's hard to resist all of this new snow is falling but be patient and wait for the danger to drop before committing to avalanche terrain. The Icefields Parkway is closed for avalanche control on Tuesday Nov 16th. For highway closures check 511AB.
Avalanche problems
Loose Dry
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 1–2
Even small avalanches in exposed terrain can have high consequences.
Storm Slabs
NNEESESSWWNW- Alpine
- Treeline
- Below treeline
- Likelihood
- Likely
- Size
- 1–2
There are public reports of ski triggered storm slabs down into the trees.
Weather Forecast
Tuesday: A mix of sun and cloud.
Alpine temperature: High -12 C.
Ridge wind west: 15-35 km/h.
Freezing level at valley bottom.
Wednesday: Cloudy with sunny periods.
Alpine temperature: Low -17 C, High -13 C.
Ridge wind southwest: 10 km/h.
Thursday: A mix of sun and cloud.
Alpine temperature: Low -14 C, High -11 C.
Ridge wind west: 10 km/h.
Snowpack Summary
Around 60cm of new snow at Parker Ridge in the past 72 hours. Moderate to strong SW winds are likely building wind slabs in the alpine and exposed treeline. This new storm snow is sitting on a variable snowpack depending on aspect and elevation with a melt freeze crust up to around 2500m, weak faceted snow near the ground and old melt freeze crusts
Avalanche Summary
There has been no clear alpine or treeline observations due to poor visibility in the last 48hrs. There is a MIN report of a size 2 slab avalanche at Parker Ridge. It is likely that there is a widespread avalanche cycle occurring in the alpine.
Confidence
Due to the quality of field observations